Safety-envelop



. PATENTED JAN. 5, 1904.

J. F. YOUNG.

SAFETY FNVELOP. APPLIOATION FILED JAN. 31, 1903.

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No. 749,010. YPATENTBD JAN. 5, 1904.

J.P.YOUNG.

SAFETY ENVELOP.

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' UNITED STATES Patented January 5, 1904.

PATENT OFFICE.

SAFETY-ENVELOP.

SPECIFICATION forming part of Letters Patent No. 749,010, dated January 5, 1904- Application filed January 31, 1903. Serial No. 141,267- (No model.)

To all whom it may concerm Be it known that I, JOSEPH F. YOUNG,a citi-- zen of the United States, residing at Pittsburg, in the county of Allegheny and State of Pennsylvania, haveinvented new and useful Improvements in Safety-Envelope, of which the following is a Specification.

This invention relates to safety-envelope, the object in view being to provide an envelop which may with perfect safety be used for transmitting by mail or express letters, papers, and other valuable documents and matter without danger of the same being abstracted from the envelop by unscrupulous persons and also without the necessity of passing various stitches through the envelop and contents, and thereby mutilating or in,- juring same.

One of the chief aims of the present invention is to provide a construction of envelop in which the entire article is formed in one piece of sheet material, such as paper, and when folded so as to inclose the contents constitutes practically a double envelop or wrapper with reinforced or double corners and interlocked flaps, thus making it impossible for any one to tamper with the contents of the envelop without detection. The contents of 'the envelop are entirely concealed, and no portion thereof may be extracted without destroying the original appearance of the envelop or partially mutilating the same.

With the above and other objects in view, which will appear as the description proceeds, the invention consists in a safety-envelop embodying certain novel features and details of construction and arrangement of parts, as hereinafter fully described, illustrated, and claimed.

In the accompanying drawings, Figure 1 is a plan view of the preferred form of envelop shown completely folded. Fig. 2 is a plan view of the same partially folded. Fig. 3 is a section'on the line5 5 of Fig. 1. Fig. 4 is a detail section on the line 6 6 of Fig. 1. Fig.

- 5 is a plan view of the unfolded -blank fro which the envelop is formed.

Like numerals of reference designate correspondingparts in all the figures of the drawings.

Theimproved envelophas the end flaps 29 made somewhat wider than the front or base The back flap 34 is made somewhat along transverse lines at the points 35, which leaves corner tabs or reinforcements 36, subsequently folded on parallel transverse lines 37, between which adhesive material is applied to the tabs, as shown at 38. When the back and back flap are folded upon the end-flaps, the tabs 35 areinserted between the folded end flaps and the front or base of the envelop and the portions 38 of. the tabs caused to adhere to the front of the envelop, thereby greatly strengthening and reinforcing the corners of the envelop adjacent to the final sealing-flap 39. The back 30 is also provided with parallel slits 40, forming an intervening strap 41, which extends lengthwise of the envelop and is adapted to have inserted thereundera tongue 42, extending outward from the free edge of the sealingflap 39, which tongue after being inserted under the strap 41 is bent or folded back, as shown in Fig. 1, and stuck to the outer surface ofthe sealing-flap, the said tongue being provided with adhesive material for that purpose. The dotted circles in Fig. 1 represent the places best adapted to receive wax seals,

such as are ordinarily applied by express companies.

From the foregoing description it will be seen that the envelop is practically double throughout and efiectively reinforced along the edges and corners, which are ordinarily subjected to the greatest wear and strain. The envelop is thus especially adapted for the transportation of valuable documents and merchandise and effectually overcomes the liability of the contents being tampered with by unauthorized or unscrupulous persons without detection.

The envelop may of course be manufactured in various sizes and various changes may be made in the form of the various flaps and the general arrangement without departing from the principle or sacrificing any of the advantages of the invention, and I therefore reserve the right to make, such changes as properly fall within the scope of the appended claims.

ICO

Having thus fully described the invention, what is claimed, and desired to be secured by Letters Patent, is-

A safety-envelop comprising a front or base, end flaps folded inwardly thereon, a back connected to the lower edge of the front or base and adapted to be folded inwardly upon the previously-folded end flaps, a back flap connected to the free side edge of the back and foldable inwardly against the inner surface of the latter, the inner surface of the back adjacent to the ends and the edges of the back flap extending over the inner surface of the back having adhesive material applied thereto, the back having parallel slits extending longitudinally thereof to form an integral strap, and a sealing-flap having a projecting tongue with adhesive material thereon, the said tongue being insertible under the strap and foldable over the same onto the lower central portion of the sealing-flap. 2. A safety-envelop comprising a front or base, end flaps, a back adapted to fold inward and cover the end flaps, a back flap connected to the back and interposed between the back and end flaps, and corner-tabs formed integrally with the back and provided with adhesive material, said tabs being inserted between the front or base and the end flaps and caused to adhere to the front or base.

In testimony whereof I aifix my signature in presence of two witnesses.

JOSEPH F. YOUNG. Witnesses:

CHAS. T. MOORE, WM. M. EWING. 

